Shifting cultivation
A) technology and practice has changed dramatically over the last three centuries.
B) requires more expenditure of energy than modern farming methods.
C) works best with low population densities.
D) is experiencing a revival among organic agriculturalists.
Answer: C
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A) fossil fuels. B) peat. C) animal waste. D) wood.
Which oxygen isotope would be concentrated in glacial ice?
A) 16O B) 17O C) 18O
Why do temperatures increase throughout most of the stratosphere? Specifically discuss the process that produces this warming effect.
What will be an ideal response?
Which of the following alcohols could be the alcohol portion of a wax?
A) ethylene glycol, C2H4(OH)2 B) glycerol, C3H5(OH)3 C) 1-triacontanol, C30H61OH D) none of these